centering a Button

How do i do this?

[choodie]

hi
im trying to centre a button and i can't get it to work for me. I'd appreciate some input as to how i could do this.
My page width is 920px
the html is as follows
<button><a class="pricebutton" href="price.html" title="pricelist">Find our Pricelist Here<button>

the CSS
a.pricebutton {
display: inline-block;
margin-left: auto;
margin-right: auto;
text-align: center;
color: white;
}

I have tried text-align: center i have tried display block. i just want it to sit in the middle of my page

thanks in advance

[lucy24]

What are you trying to center? The button or the <a> within the button? The CSS only applies to the <a> element; it says nothing about <button>.

[Fotiman]

That markup is also invalid.
1. You can't have an <a> within a <button>
2. You didn't close the <a> with a </a> before the closing </button>

[choodie]

thanks guys elementery mistakes im just a beginner. its all good now.